Description:
Ultimate protection Class RK1 dual element, current-limiting, time-delay fuses available with optional open fuse indication.
Time-delay:
10 seconds (minimum) at 500% of rated current for 35-60A.
8 seconds for 0-30A sizes.
Catalog Symbol:
LPN-RK(amp)SP (non-indicating)
LPN-RK(amp)SPI (indicating)
Ratings:
Volts: 250Vac, 125Vdc(0-60A); 250Vac, 250Vdc(70-600A)
Amps: 1⁄10-600A
IR: 300kA Vac RMS Sym. 100kA Vdc
Agency Information:
CE,
UL Listed, Guide JDDZ, File E4273
CSA Certified, Class 1422-02, File 53787,Class RK1 per CSA C22.2, No. 248.12
Catalog Numbers (amps) Non-indicating Fuses
| LPN-RK-1/10SP | LPN-RK-2-1/4SP | LPN-RK-12SP | LPN-RK-110SP |
| LPN-RK-15/100SP | LPN-RK-2-1/2SP | LPN-RK-15SP | LPN-RK-125SP |
| LPN-RK-2/10SP | LPN-RK-2-8/10SP | LPN-RK-17-1/2SP | LPN-RK-150SP |
| LPN-RK-3/10SP | LPN-RK-3SP | LPN-RK-20SP | LPN-RK-175SP |
| LPN-RK-4/10SP | LPN-RK-3-2/10SP | LPN-RK-25SP | LPN-RK-200SP |
| LPN-RK-1/2SP | LPN-RK-3-1/2SP | LPN-RK-30SP | LPN-RK-225SP |
| LPN-RK-6/10SP | LPN-RK-4SP | LPN-RK-35SP | LPN-RK-250SP |
| LPN-RK-8/10SP | LPN-RK-4-1/2SP | LPN-RK-40SP | LPN-RK-300SP |
| LPN-RK-1SP | LPN-RK-5SP | LPN-RK-45SP | LPN-RK-350SP |
| LPN-RK-1-1/8SP | LPN-RK-5-6/10SP | LPN-RK-50SP | LPN-RK-400SP |
| LPN-RK-1-1/4SP | LPN-RK-6SP | LPN-RK-60SP | LPN-RK-450SP |
| LPN-RK-1-4/10SP | LPN-RK-6-1/4SP | LPN-RK-70SP | LPN-RK-500SP |
| LPN-RK-1-6/10SP | LPN-RK-8SP | LPN-RK-80SP | LPN-RK-600SP |
| LPN-RK-1-8/10SP | LPN-RK-9SP | LPN-RK-90SP | |
| LPN-RK-2SP | LPN-RK-10SP | LPN-RK-100SP |
Catalog Numbers (amps) with indicating Fuses
Requires 75Vac minimum voltage.
| LPN-RK-35SPI | LPN-RK-100SPI | LPN-RK-300SPI |
| LPN-RK-40SPI | LPN-RK-110SPI | LPN-RK-350SPI |
| LPN-RK-45SPI | LPN-RK-125SPI | LPN-RK-400SPI |
| LPN-RK-50SPI | LPN-RK-150SPI | LPN-RK-450SPI |
| LPN-RK-60SPI | LPN-RK-175SPI | LPN-RK-500SPI |
| LPN-RK-70SPI | LPN-RK-200SPI | LPN-RK-600SPI |
| LPN-RK-80SPI | LPN-RK-225SPI | |
| LPN-RK-90SPI | LPN-RK-250SPI |
Carton Quantity and Weight
| Amp Rating | Carton Qty. |
| 0-30 | 10 |
| 35-60 | 10 |
| 70–100 | 5 |
| 110–200 | 1 |
| 225–400 | 1 |
| 450–600 | 1 |
Dimensions – in
Features (0-60A)
• Industry’s only UL Listed and CSA Certified fuse with a 300kA Vac interrupting rating that exceeds requirements for virtually all applications
• Current-limitation for maximum short-circuit protection
• Easy selective coordination with all Low-Peak fuses using simple 2:1 ampacity ratio
• “No damage” Type “2” protection for IEC and NEMA starters when properly sized
• High inrush current motor protection
• Time-delay permits 130% FLA sizing for back-up motor protection
• Protection against single-phase motor damage
• Low watt loss power consumption
• Electrically isolated end caps for added safety
Features (70-600A)
• Industry’s only UL Listed and CSA Certified fuse with a 300kA Vac interrupting rating that exceeds requirements for virtually all applications
• Fast short-circuit protection provides optimal arc flash protection to reduce hazard to personnel
• Easy selective coordination with all Low-Peak fuses using simple 2:1 ampacity ratio
• Current-limiting for maximum short-circuit protection
• “No damage” Type “2” protection for IEC and NEMA motor starters when properly sized
• High in-rush current motor protection
• Time-delay that permits 130% FLA sizing for back-up motor protection
• Provides protection against single-phase motor damage
• Low watt loss power consumption
• Electrically isolated end caps for added safety
Applications (70-600A)
• Feeder and Branch Circuits
• Transformers
• Motors
• Solenoids
• General Purpose Circuits
Recommended Fuse Blocks
| Fuse amps | 1-pole | 2-pole | 3-pole |
| 0-30 | H25030-1 | H25030-2 | H25030-3 |
| R25030-1 | R25030-2 | R25030-3 | |
| 35-60 | H25060-1 | H25060-2 | H25060-3 |
| R25060-1 | R25060-2 | R25060-3 | |
| 70-100 | RM25100-1CR | RM25100-2CR | RM25100-3CR |
| 110-200 | RM25200-1CR | RM25200-2CR | RM25200-3CR |
| 225-400 | RM25400-1CR | RM25400-2CR | RM25400-3CR |
| 450-600 | RM25600-1CR | RM25600-2CR |
RM25600-3CR |
Fuse Reducers For Class R Fuses
| Equipment Fuse Clips |
Desired Fuse (Case) Size |
Catalog Numbers (Pairs) 250V |
| 60A | 30A | NO.263-R |
| 100A | 30A | NO.213-R |
| 60A | NO.216-R | |
| 200A | 60A | NO.226-R |
| 100A | N0.2621-R | |
| 400A | 100A | NO.2641-R |
| 200A | NO.642-R | |
| 600A | 100A | NO.2661-R |
| 200A | NO.2662-R | |
| 400A | NO.2664-R† |
† Single reducer only (pair not required).
Time-Current Curves - Average Melt
Current-Limitation Curves
Current-Limiting Effects
| Prosp. S.C.C. |
Let-Through Current (Apparent RMS Symmetrical Vs. Fuse Rating) |
|||||
| — | 30A | 60A | 100A | 200A | 400A | 600A |
| 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| 2000 | 1000 | 1000 | 2000 | 2000 | 2000 | 2000 |
| 3000 | 1000 | 1000 | 2000 | 3000 | 3000 | 3000 |
| 5000 | 1000 | 2000 | 2000 | 3000 | 5000 | 5000 |
| 10,000 | 1000 | 2000 | 3000 | 4000 | 7000 | 9000 |
| 15,000 | 1000 | 2000 | 3000 | 5000 | 8000 | 11,000 |
| 20,000 | 1000 | 3000 | 3000 | 5000 | 8000 | 11,000 |
| 25,000 | 1000 | 3000 | 3000 | 5000 | 9000 | 12,000 |
| 30,000 | 2000 | 3000 | 4000 | 6000 | 9000 | 12,000 |
| 35,000 | 2000 | 3000 | 4000 | 6000 | 10,000 | 13,000 |
| 40,000 | 2000 | 3000 | 4000 | 6000 | 10,000 | 13,000 |
| 50,000 | 2000 | 3000 | 4000 | 7000 | 11,000 | 14,000 |
| 60,000 | 2000 | 3000 | 4000 | 7000 | 11,000 | 16,000 |
| 70,000 | 2000 | 3000 | 4000 | 7000 | 12,000 | 16,000 |
| 80,000 | 2000 | 4000 | 5000 | 8000 | 12,000 | 16,000 |
| 90,000 | 2000 | 4000 | 5000 | 7000 | 13,000 | 17,000 |
| 100,000 | 2000 | 4000 | 5000 | 8000 | 13,000 | 17,000 |
| 150,000 | 2000 | 4000 | 6000 | 9000 | 15,000 | 19,000 |
| 200,000 | 3000 | 5000 | 6000 | 11,000 | 16,000 | 20,000 |
| 250,000 | 3000 | 5000 | 7000 | 11,000 | 17,000 | 21,000 |
| 300,000 | 3000 | 6000 | 7000 | 12,000 | 18,000 | 22,000 |